All the sounds on my BBZ10 have vanished. Media, phonecalls, notification alerts, alarm, nothing is working. Please help.The setting is saved to normal. I have tried a reboot and battery pull, nothing helps. Very distressed.

All the sounds on my BBZ10 have vanished. Media, phonecalls, notification alerts, alarm, nothing is working. Please help.The setting is saved to normal. I have tried a reboot and battery pull, nothing helps. Very distressed.